| Acronym | Meaning |
| RCTM | Regional Chemical Transport Model |
| IXS | International XAFS Society |
| IAT | Island Arc Tholeiite |
| LOIS | Land-Ocean Interaction Study |
| EBA | Eikonal Born Approxn. |
| ENAC | Energetic Neutral Atom Camera |
| CAM | Complex Angular Momentum (for Rotationally Inelastic Scattering) |
| ZDC | Zero-degree Calorimeter |
| TDRH | Time-dependent Rotated Hartree (theory) |
| PVS | Performance Verification Sample |